Added Leetcode Problem 240.

Problem : Search a 2D Matrix II
URL : https://leetcode.com/problems/search-a-2d-matrix-ii/

Author: GaurishIIITNR

LeetCode Solutions/Search_a_2D_Matrix_II.cpp

@@ -0,0 +1,22 @@
+class Solution
+{
+public:
+    bool searchMatrix(vector<vector<int>> &matrix, int target)
+    {
+        int j = matrix[0].size() - 1, i = 0;
+        while (1)
+        {
+            if (j < 0 || i > matrix.size() - 1)
+                return 0;
+            if (matrix[i][j] > target)
+                j--;
+            else if (matrix[i][j] < target)
+                i++;
+            else
+                return 1;
+        }
+        if (matrix[i][j] == target)
+            return 1;
+        return 0;
+    }
+};